How accurate are current mobile advertising solutions?

There are a lot of things that go into the ad selection on a given request.  Location certainly plays a part along with handset and some prior activity.  At Jumptap, we are working to tie external data sources to a given profile or request to increase the quality of the ads displayed.  We have several blog entries and press releases that talk about this. 

Rather than go on about Jumptap's offerings, I'll explain why this is difficult.  It basically comes down to Apple.  By default, iOS doesn't allow third party cookies.  On top of that, cookies dropped within an app's browser session aren't saved in the safari cookie store.  This makes it very difficult to build ties to external data sources or good profiles.

Optometry: Is the relationship between vision in 20/X and spherical correction (in diopters) one-to-one?

It's approximately 0.25 Diopters per line of visual acuity on the Snellen cart.

20/15 = 0 (or could be hyperopic and accommodating)
20/20 = 0 to -0.25 (or could be hyperopic and accommodating)
20/25 = -0.25 to -0.50
20/30 = -0.50 to -0.75
20/40 = -0.75 to -1.00

(please note this is just a rough rule of thumb, definitely other factors can come into play, such as ocular and systemic diseases)

Just dividing the numbers gives you a certain value called the MAR (minimal angle of resolution), which is useful in other ways. The wikipedia article posted on a previous question is great for explaining this:…

What led to the creation and ongoing existence of the Apologetics Industry?

"Apologetics" derives from the Greek ἀπολογία meaning "speaking in defence".  In ancient Greek legal cases the prosecution delivered the κατηγορία ("categoria") and the defence replied with the ἀπολογία (apologia).  So apologetics of any kind is simply preseting a "case for the defence".

Early Christian apologetics were works written in response to attacks on Christianity by Jewish and pagan critics, written by early Christian leaders and intellectuals like Justin Martyr and Irenaeus.  Modern apologetics ranges widely in sophistication and audience, from highly academic works to popularist apologetics aimed at a mass audience.  These in turn can range in their sophistication from works by highly intellectual writers like C.S Lewis to dumbed-down fundamentalist evangelism by the likes of Josh McDowell and Lee Strobel.  It can also include apologetics for a particular narrow strain of evangelical fundamentalism, like the defences of "Creation Science" by the likes of Ken Ham and Kent Hovind.

Exactly what the "creation of the apologetics industry" referred to in the question awkwardly tacked onto the rant above might be is unclear, since apologetics have been around since at least the letters of Paul and certainly since the Second Century.  If the questioner is referring to recent mass-market and highly popularised efforts at apologetics by fundamentalist Christians then what led to this was the fact that the believers in that form of Christianity felt they needed to defend their beliefs against critiques both by non-Christians and non-fundamentalist Christians.

Since apologetics is nothing more than a response to critiques and a defence against attacks, to say that apologetics is somehow invalid is effectively saying that those critiques and attacks are also unacceptable, which is absurd.  If we attack them, clearly they have a right to respond.  Even if we find many of their responses are silly.

That was a particularly pointless question.  Dawkins' The God Delusion is atheist apologetics in response to criticisms, misapprehensions and attacks on that perfectly valid position by theists.  To imply that his apologia implies there must be "serious structural flaws" in atheism would be absurd.  All you need for a response to critiques are some critiques, nothing more.

The question above is little more than the questioner stating "I think a lot of fundamentalist Christian apologetics is weak and stupid."  Barely worth noting, let alone contriving a so-called "question" about.

How Things Work: What are the physical attributes that make soap wash?

The first thing to understand is that soap alone does not wash. Soap with water is what washes.

When you go around in your daily life, all kinds of grit and grime collect in your hands as you pick things up, hold onto things, touch various surfaces and do whatever it is you do – this is inevitable. All of this grit can basically be broken down into three parts:

Inorganic materials – these are mostly soluble in water on their own so rinsing with water will remove most of this.

Organic materials – such as oil or grease – these will not dissolve in water on their own, and on top of that they have a tendency to stick to your skin (skin has a certain affinity for oils and tends to repel water, technically we would say it's hydrophobic). One of the things soap does is help these oils to come loose and away from your skin – while it is possible for soap to completely dissolve oils this is normally not needed for washing as all you want is for the greasy stuff to come off the skin, not necessarily to fully dissolve it.

Biological materials – i.e. germs of various kinds. They are all over the place, your hands are full of them but don't panic! Soap actually does two things with these germs. First it also helps them to come off your skin. Like skin germs tend to be hydrophobic so they have a certain affinity for skin. But even more importantly soap can punch holes through the walls of germs, causing them to die. Mind you soap will not completely disinfect your skin but it will significantly reduce the microbial load which you have there. Again this works when soap is used with water because the water acts as a way to carry the soap to all the nooks and crannies in your skin (way too small to see with the naked eye, but they are there).

What is the property of soap that makes it so effective at this? Here take a look:

The fact that soap has two parts – one that is water soluble and one that is oil soluble is what makes it wash so well, because it allows, when washing in water to remove much more effectively the organic and biological material which accumulates on your hands and in addition it helps kill the bacteria which has accumulated there.

What are the slimiest SEO practices?

  • Paid links, of any sort (seriously)
  • Fake content, fake blogs, etc. just to generate a place to link back to a site
  • Crap content on your own site just to show up for a given term (for instance, I had a client who another agency talked them into doing all this weird content for terms they never needed to rank for, like driving directions, etc.)
  • Any of the classics, like doorway pages, etc., that still get used all the time.

What does it feel like to be highly talented in something that no one knows how to describe?

I am a person who lives their life on a board.  I snowboard, longboard, skateboard, and what I am best at, wakeboard. To be highly talented in something you want to do is all with experience. You crash, you learn from it.  It is something that is more physical than mental, of course you pick up a few mental techniques or learn from an instructor, but it is really just training your body to build muscles you didn't know you have even had before.  These muscles that you will gain will help you keep your balance, run faster, and increase your endurance. Because it is mostly bodily based, it is hard to teach people what you know and how you learned how to do it. It all comes with experience and constant training in that subject.  Even the people who are highly trained in brain, such as speech and debate and what not, cannot teach you how they learned because being highly talented at something is not knowledge based.  There is no knowledge to share.  It honestly feels great when people praise you for something you can do that hardly any one else can.  It is a feeling that shouldn't be abused as looking as if you were above people but it is a feeling you cannot help (I try my hardest not to treat people like they are below me and don't believe that I ever have). It has to be something you have passion for and the appraisal for what you can do just increases that passion and just makes you want to do this talent more.  This is what I believe what it feels like to be talented

How do AMD chips compare to Intel chips for VFX rendering?

In my experience they both work fine, but Intel and NVidia have more specialized equipment which will work better such as the Intel Xeons and NVidia Quadros.  Most professional companies including Pixar use Nvidia GPUs which carry most of the rendering load, I'm not sure what CPUs they use, but that isn't as important.

How Pixar Uses GPUs to Give Their Artists What They Need Most – Time to Play